AM_Clinoptilolite-Na_1 Formula: Na2.12 Ca.9 K.14 Mg.08 (Al4.08 Si13.92) O48.44 H12.44 Name: Clinoptilolite-Na Unit cell: 17.628 17.902 7.403 90.0 116.52 90.0 , V=2090.39 Space group: C12/M1 (12)

Armbruster T , Gunter M E , American Mineralogist , 76 (1991) p.1872-1883, Stepwise dehydration of heulandite-clinoptilolite from Succor Creek, Oregon,, U.S.A.: A single-crystal X-ray study at 100K, sample name: dehyd1